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Thickening seal head and design method thereof

A design method and head technology, applied in ship design, ship parts, ships, etc., can solve problems such as the decline of compressive capacity, achieve the effect of reducing stress concentration and increasing ultimate load

Pending Publication Date: 2022-03-01
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: To provide a thickened head and its design method, which can solve the problem of the stress concentration caused by the discontinuous curvature of the existing head and thus reduce the compressive capacity, and can calculate the ultimate load of the thickened head

Method used

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  • Thickening seal head and design method thereof
  • Thickening seal head and design method thereof
  • Thickening seal head and design method thereof

Examples

Experimental program
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Effect test

no. 1 example

[0077] A method for designing a thickened head is provided, which specifically includes the following steps:

[0078] (101), select an existing butterfly head as the head before deformation, determine the thickening range and thinning range of the thickening head relative to the thickening head before deformation: in the thickening head along its central axis In the half section or the whole section in the direction of 01, the arc length L1 of the first thickening zone 12 of the thickening head, the arc length s1 of the second thickening zone 21, and the arc length of the outer ring surface of the ring part 2 are selected. The length is s, wherein s1 is less than or equal to s, and L1 is less than or equal to s; the radial thicknesses of the first thickened region 12 and the second thickened region 21 are set to be equal and both are t 2 , the radial thicknesses of the first thinned region 11, the second thinned region 22, and the third thinned region 31 are equal and all are ...

no. 2 example

[0128] A method for designing a thickened head is provided, which specifically includes the following steps:

[0129] (201) Select an existing butterfly head as the head before deformation, and determine the thickening range and thinning range of the thickened head relative to the thickened head before deformation: in the thickened head along its central axis 01 In the cross-section in the direction, select the arc length L1 of the first thickening zone 12 of the thickening head, the arc length s1 of the second thickening zone 21, and the arc length of the outer ring surface of the ring part 2 is s, wherein s1 is less than or equal to s, and L1 is less than or equal to s; the radial thickness of each first thickened region 12 and second thickened region 21 is set to be t 2 , the radial thicknesses of the first thinned region 11, the second thinned region 22, and the third thinned region 31 are all t 1 ; Calculate the thickness coefficient δ of the thickening head as: t 1 = t...

no. 3 example ；

[0159] A method for designing a thickened head is provided, which specifically includes the following steps:

[0160] (301), select an existing butterfly head as the head before deformation, determine the thickening and thinning range of the thickening head relative to the thickening of the head before deformation;

[0161] The difference from the parameters of the first embodiment and the second embodiment is that the thickened part of the thickened head includes: an area with an arc length s1=s extending from the joint part 5 to the junction of the ring part 2 and the column 3 , and the arc length extending from the joint 5 to the top 4 Area;

[0162] Set the radial thickness of the thickening zone as t 2 , the radial thickness of the thinned zone is t 1 , using the formula (1) to calculate the thickness coefficient δ, which satisfies the formula: t 1 = t 2 *δ(5);

[0163] In this step (301), select as figure 1 The existing butterfly head as shown, and the uniform th...

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Abstract

The invention provides a thickened end socket and a design method thereof, and the thickened end socket comprises a ball head which is provided with a first thinning area and a first thickening area; the ring part comprises a second thickening area and a second thinning area, and the cylinder body comprises a third thinning area; the design method comprises the steps that an existing butterfly-shaped seal head is selected as a seal head before deformation, and the thickening range and the thinning range of a thickened seal head are determined; the superficial area of the thickened seal head, the superficial area of a thinning area and the superficial area of a thickening area are calculated; based on the fact that the total volume of the thickened end socket under different thickening coefficients is equal to the total volume of the end socket before deformation, the thickness t1 of the thinning area and the thickness t2 of the thickened area are determined; establishing a thickened end socket simulation model; drawing a variable thickness coefficient delta-load coefficient k graph, and selecting the value range of the corresponding variable thickness coefficient delta when the load coefficient k is greater than 1 and the value of the load coefficient k is reduced along with the increase of the variable thickness coefficient delta as a beneficial variable thickness interval; fitting a variable thickness coefficient delta-load coefficient k functional equation; and determining a variable-thickness seal head limit load prediction model under different variable-thickness coefficients delta.

Description

technical field [0001] The invention relates to the field of mechanical structure design, in particular to a thickening head and a design method thereof. Background technique [0002] The pressure shell is the most important structural unit of the submersible. Its structural design must meet the ultimate strength requirements, have good mechanical properties, and space utilization in the shell; High efficiency and good bearing capacity have been widely used, and compared with spherical heads and elliptical heads, dished heads have better machinability and low production cost. The existing dish-shaped head structure such as figure 1 As shown, the existing dished head includes a ball head 100, a ring portion 200 and a cylinder 300, the ball head 100 is located at the upper position of the existing dished head, and the ring portion 200 is located in the middle of the existing dished head , the cylinder body 300 is located at the lower part of the existing dish-shaped head, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B3/13B63B71/10
CPCB63B3/13B63B71/10Y02T90/00G06F30/15G06F30/20
Inventor 张建胡豪夫赵坦展铭李泓运王芳苏世杰
Owner JIANGSU UNIV OF SCI & TECH
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